From ESRI, this link takes you to a 30-day trial. Colgate has its own instance of ArcGIS Online, please contact the Geography Dept or IT for an account.

Interactive tool for mapping several types of environmental information, including drinking water, toxic and air releases, hazardous waste, water discharge permits, and Superfund sites. Also links to text reports

This is an interactive environmental justice mapping tool developed by the EPA. It brings together data from wide variety of sources (EPA, US Census, USGS, Bing maps, etc.) that can be displayed geographically a tremendous range of scales from the very local to the national level. The resulting maps can be printed out and/or cut and pasted as images into other documents.

From the National Wetlands Inventory Center of the U.S. Fish and Wildlife Service.

This web-based mapping tool allows you to make maps of Europe, the Mediterranean Basin, North Africa, and the Near East. It covers 750 BCE to 600 CE. You can save and print your map as a PDF or save it as a KML for use with Google Earth.

Interactive atlas of US history from the Digital Scholarship Lab at the University of Richmond.

Interactive map showing food insecurity at the state, county, and Congressional District-level.